Yeah, even the smartest cats are only about as smart is a 3 year old. And anyone who has ever watched a 3 year old knows that they’re constantly attempting to kill themselves. The issue is that cats have the physical capacity to get into way more dangerous scenarios, because they can easily jump, climb, and squeeze into places that a 3 year old wouldn’t be able to. So even if you have toddler-proofed your house, (which is a massive task by itself) there are still plenty of things that a cat can get into.